Question

# a. What effect does light have on silver halides ?
b. What is reduced in this reaction ?
c. Explain How the reaction is used in photography.​

Answer 1

Answer:

a) When exposed to light, a chemical reaction darkens the film to produce an image. The brighter the light falling on the photographic film or paper, the faster the reaction - and the darker that part of the (negative) image appears.

b) Ag+ + e− →Ag

c) This reaction is the key to the traditional photgraphic process. In black - and - white photography, it is simply the impact of light on sensitized silver halide microcrystals that initiates the production of the negitive image. For color photography, the film is composed of layers, with organic dyes acting as color filters for the AgBr.

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